defpackage

Macro

Summary

Package

common-lisp

Signature

defpackage
defined-package-name
[[
option
]] =>
package

Arguments

defined-package-name

A string.

option

Keyword options.

add-use-defaults

A keyword

Values

package

A package.

Description

The macro
defpackage
is as defined in the ANSI standard, with the inclusion of the
:add-use-defaults
keyword. However, the standard explicitly declines to define what
defpackage
does if
defined-package-name
already exists and is in a state that differs from that described by the
defpackage
form.

Therefore an extension has been written that allows you to select between alternative behaviors. See
*handle-existing-defpackage*
for full details.

One non-standard
option
is supported.
:add-use-defaults
, with a true argument, causes the package
defined-package-name
to inherit from the following packages (as well as any explictly specified by the
:use
option):